This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 19 |
| 3 | 69 |
| 4 | 188 |
| 5 | 496 |
| 6 | 1029 |
| 7 | 2015 |
| 8 | 3478 |
| 9 | 5778 |
| 10 | 9519 |
| 11 | 14479 |
| 12 | 21768 |
| 13 | 31526 |
| 14 | 43609 |
| 15 | 59025 |
| 16 | 79218 |
| 17 | 105178 |
| 18 | 135739 |
| 19 | 173795 |
| 20 | 219164 |
| 21 | 271140 |
| 22 | 333629 |
| 23 | 406171 |
| 24 | 491878 |
| 25 | 594698 |
| 26 | 711959 |
| 27 | 842151 |
| 28 | 988848 |
| 29 | 1150168 |
| 30 | 1330177 |
| 31 | 1548617 |
| 32 | 1791098 |
| 33 | 2063454 |
| 34 | 2359107 |
| 35 | 2698231 |
| 36 | 3064708 |
| 37 | 3470396 |
| 38 | 3918157 |
| 39 | 4404795 |
| 40 | 4938846 |